Description of problem:
When browsing the list of screensavers, follwing message is emitted:
[drm:radeon_lock_take] *ERROR* 4 holds heavyweight lock
Hardware:
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon VE QY
on a 2-CPU Dell 450 (with HT enabled -> 4 logical processors).
The X server locked once when running a "Boxed" screensaver (the machine was
still alive and could be rebooted remotely).
Version-Release number of selected component (if applicable):
4.3.0-2
How reproducible:
Sometimes
Steps to Reproduce:
1. run some OpenGL screensavers.
2. hope to see it, too.
Actual Results: Warning messages. Ocassional hangs.
Additional info:
While this problem is not 100% reproducible, I thought I would file it here to
have the issue tracked (I have not found any related report).

You have attached your config file however you did not attach the rest
of the information requested above. Please attach your X log file
from after the lockup, and the complete /var/log/messages file as individual
bugzilla attachments.
The more information you provide and the greater the detail, the more
likelyhood of us being able to determine the problem and possibly fix
it.
Thanks.

Sorry for the delay but this is a production machine and I am not allowed to
play with it whenever I like. The error message "[drm:radeon_lock_take] *ERROR*
4 holds heavyweight lock" has been reproduced by running "Boxed" screensaver
demo and switching between windows. The mouse still moved after the lockup but
the computer did not react to keyboard or mouse clicks. The lockup was removed
by logging in via ssh and killing boxed.

Can confirm this bug is also evident on a Dell Lattitude 610 notebook, with an
ATI Technologies Inc Radeon Mobility M6 LY (rev 0) graphics card. I have had the
lockups happening since installing RH9.0 when scrolling through different X
screensavers.
Updated to kernel 2.4.20-18.9 in case the driver had been fixed, but I find that
the machine still locks up.
This is a personal laptop, so I am in a position to do some testing if required.

I also find the lockup happens sometimes when the screen saver has been running,
that is, without accessing it through Preferences. On moving the mouse, the
screen saver goes away, the cursor moves, but I can't select windows, and
CTR-ALT-BS or CTL-ALT-F1..F6 or CTL-ALT-DEL don't work. The only recourse is to
log in remotely and kill the screen saver process, which is still hanging around.

Since this bugzilla report was filed, there have been several major
updates to the X Window System, which may resolve this issue. We
encourage you to upgrade to the latest version of Fedora Core
(http://fedora.redhat.com).
If this issue turns out to still be reproduceable in the latest
version of Fedora Core, please file a bug report in the X.Org
bugzilla located at http://bugs.freedesktop.org in the "xorg"
component.
Once you've filed your bug report to X.Org, if you paste the new
bug URL here, Red Hat will continue to track the issue in the
centralized X.Org bug tracker, and will review any bug fixes
that become available for consideration in future updates.

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